Kepler's second law of planetary motion is known as the law of
a. ellipses.
b. equal areas.
c. harmonic periods.
d. gravitation.
b
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The color of an object depends on the colors of
A) the light that illuminates them. B) molecules that comprise them. C) the foreground.
When an electrical switch is closed or opened in the vicinity of an operating AM radio, a burst of static can be heard. Which of the following, involving the throwing of the switch, would likely be the cause for this static?
a. The sound from the switching is the source of waves. b. Unnoticed lightning hits nearby every time the switch is thrown. c. Static happens without any cause. d. Electrons are accelerated during the switching process.
The characteristic rotational energy, h2/8?2I, for O2 is 2.9 × 10-23 J. Calculate the O2 bond length
A) 3.6 × 10-10 m B) 0.60 × 10-11 m C) 1.2 × 10-10 m D) 0.30 × 10-11 m E) 2.4 × 10-10 m
In brane-world theory, there are more _______ than we are accustomed to.
A. strings B. gluons C. monopoles D. dimensions E. leptons